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Expired Canadian patentCanada

Radio communication network system comprising a connecting equipment unit operable in different modes

CA 1288822 C · Owner: Nec Corporation · Inventors: Sato, Mitsuo; Murata, Yoshitoshi; Hashimoto, Tadao

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In a radio communication network system for use in carrying out communication with a plurality of radio telephone sets in a service zone by the use of a control channel and a plurality of speech channels a connecting, equipment unit (CE) is selectively operable in cooperation with a radio control unit (RCU) in a speech mode of forming a speech path through a selected one of the speech channels and an additional mode of selectively monitoring the control and the speech channels. The additional mode may be divided into first and second control modes for allowing and rejecting reception of a call with the control channel monitored respectively. Alternatively, either a rest mode or a …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted September 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 27, 1988
GrantedSeptember 10, 1991
Term endedSeptember 10, 2008
Patent numberCA 1288822 C
Classification (IPC)H04W84/16

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMay 27, 1988Patent grantedSep 10, 1991Term endedSep 10, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.